*{
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
  color: #606266;
  font-size: 14px;
  box-sizing: border-box;
}
/* 蒙层样式 */
.mask{
  width:100%;
  height:100%;
  position:fixed;
  background-color:#b2b2b2;
  z-index:99;
  top:0;
  left:0;
  opacity:0.8;
}
